Our Shaka unisex sunglass style features a large retro wayfarer TR90 frame and PC polarized lenses. Your order arrives packaged in a microfiber pouch which doubles as a cleaning cloth. TR90 is a super-polymer compound that is extremely lightweight, incredibly sturdy, but very flexible. PC (polycarbonate) lenses are about 10 times more impact resistant than normal plastic or glass lenses. They are lightweight and provide ultra violet (UV) protection. Frame color:  shiny crystal brown and blue Lens color:  amber Amber lenses make cloudy days a bit brighter. They block high amounts of blue light to heighten contrast and visual acuity . They can improve depth perception and are especially useful for fishing in shallow waters with grassy bottoms.